The reason for such tough policy is social control and huge budget of the Norwegian CPS (over 3 billion dollars per year).
The working and living conditions are fine in Norway but remember that you will be under constant watch. You do not need to do anything wrong. Say, your child needs special assistance, has ADHD, speaks a few languages and, therefore, slow in learning Norwegian, CPS will turn it against you. You can easily lose your child.
It is difficult to believe in that until you face it yourself. Many parents make this mistake not believing it is possible until it is late.
Think many times before moving to Norway, investing your time and money into the country and then having to move out trying to save your family.
Here is the BBC documentary that tells more about the Norwegian CPS.